Hadieth

The Messenger of Allah (sal Allahu alaihi wa sallam) said: "This fire of yours, which the sons of Adam kindle, is one part from seventy parts of the heat of Hell." They said: "By Allah! Would it not have been enough O Messenger of Allah?!" He (sal Allahu alaihi wa sallam) said: "It is sixty-nine parts more - all of them similar in heat." [Jami At-Tirmidhi - graded sahih]
Commentary: We know different types of fires on earth, and the degree of heat varies for each. For instance, grass on fire emits less heat than burning wood. Burning coal, on the other hand, is much hotter than burning wood. Similar is the case of the heat generated by welding and electricity. Far more intense than all these, is the heat generated by bombs. Hellfire, however, generates more heat -- sixty-nine times more than earthly fire!
The main purpose behind the description of Hellfire is to kindle in the hearts of humans the urge to take the necessary measures to avoid that fire.
Recite: Allahumma ajirni min an-naar-" O Allah! Save me from the fire"